Mike Wielputz, regional technical specialist, extrudes a soil sample from a drill tube and prepares it for testing at the U.S. Army Corps of Engineers Savannah District Environmental and Materials Unit. USACE photo by Tracy Robillard.

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This work, USACE Savannah District Environmental & Materials Lab [Image 4 of 8], by Tracy Robillard, identified by DVIDS, is free of known copyright restrictions under U.S. copyright law.